男生女生之间交往表现为[ ]
①自然大方地进行交往 ②尽量在集体活动中进行交往 ③懂得自爱 ④尊重对方的人格
A、②④
B、②③
C、①②③
D、①②③④
答案:D
对话排序。
A. Yeah. I wasn't very outgoing.
B. Hey, Steve! Over here! Don't you remember me?
C. No, you weren't. But you were always friendly.
D. That's right.
E. But you used to be very quiet, didn't you?
F. Oh, wow! You are Paula, aren't you?
___________________
粮食的主要成分是 ______ .2008年世界上出现了粮食危机,有的国家甚至引起社会动荡,出现粮食危机的原因之一是因为石油价格上涨,有的粮食出口国将粮食转化为“生物柴油”.“生物柴油”的主要成分是乙醇,乙醇的俗称为 _______ ,它在空气中燃烧的化学方程式为 __________________________ .